<template>
	<div class="mpvue-picker">
		<div :class="{'pickerMask':showPicker}" @click="maskClick" catchtouchmove="true"></div>
		<div class="mpvue-picker-content " :class="{'mpvue-picker-view-show':showPicker}">
			<div class="mpvue-picker__hd" catchtouchmove="true">
				<div class="mpvue-picker__action" @click="pickerCancel">取消</div>
				<div class="mpvue-picker__action" :style="{color:themeColor}" @click="pickerConfirm">确定</div>
			</div>
			<picker-view indicator-style="height: 40px;" class="mpvue-picker-view" :value="pickerValue" @change="pickerChange">
				<block>
					<picker-view-column>
						<div class="picker-item" v-for="(item,index) in date_list" :key="index">{{item}}</div>
					</picker-view-column>
					<picker-view-column>
						<div class="picker-item" v-for="(item,index) in date_list" :key="index">{{item}}</div>
					</picker-view-column>
				</block>
			</picker-view>
		</div>
	</div>
</template>
<script>
	import date from './date.js';
	export default {
		data() {
			// const day_time = [];
			// for (let i = 0; i <= 24; i++) {
			// 	var time = '';
			// 	time = i < 10 ? '0' + i : i;
			// 	for (let j = 0; j < 60; j = j + 5) {
			// 		var time_date = time + ':' + (j < 10 ? '0' + j : j);
			// 		day_time.push(time_date);
			// 		if (i == 24) {
			// 			break;
			// 		}
			// 	}
			// }
			// console.log(JSON.stringify(day_time));
			return {
				pickerValue: [0, 0],
				date_list: [],
				/* 是否显示控件 */
				showPicker: false,
			};
		},
		created() {
			this.init()
		},
		props: {
			/* 默认值 */
			pickerValueDefault: {
				type: Array,
				default () {
					return []
				}
			},
			/* 主题色 */
			themeColor: String
		},
		watch: {
			pickerValueDefault() {
				this.init();
			}
		},
		methods: {
			init() {
				this.date_list=date;
				setTimeout(() => {
					this.pickerValue = this.handPickValueDefault();
				});
			},
			show() {
				setTimeout(() => {
					this.showPicker = true;
				}, 0);
			},
			maskClick() {
				this.pickerCancel();
			},
			pickerCancel() {
				this.showPicker = false;
				this._$emit('onCancel');
			},
			pickerConfirm(e) {
				this.showPicker = false;
				this._$emit('onConfirm');
			},
			showPickerView() {
				this.showPicker = true;
			},
			//设置默认值
			handPickValueDefault() {
				let tempPickerValue = this.pickerValueDefault;
				if (this.pickerValueDefault !== [0, 0]) {
					if (this.pickerValueDefault[0] > this.date_list.length - 1) {
						tempPickerValue[0] = this.date_list.length - 1;
					}
					if (this.pickerValueDefault[1] > this.date_list.length - 1) {
						tempPickerValue[1] = this.date_list.length - 1;
					}
					if(this.pickerValueDefault[0]>this.pickerValueDefault[1]){
						tempPickerValue[1]=tempPickerValue[0];
					}
				}
				return tempPickerValue;
			},
			pickerChange(e) {
				let changePickerValue = e.mp.detail.value;
				if (this.pickerValue[0] !== changePickerValue[0]) {
					// 第一级发生滚动
					if (changePickerValue[0] > changePickerValue[1])
						changePickerValue[1] = changePickerValue[0];
				} else if (this.pickerValue[1] !== changePickerValue[1]) {
					// 第二级滚动
					if (changePickerValue[0] > changePickerValue[1])
						changePickerValue[0] = changePickerValue[1];
				}
				this.pickerValue = changePickerValue;
				this._$emit('onChange');
			},
			_$emit(emitName) {
				let pickObj = {
					start_time: this.date_list[this.pickerValue[0]],
					end_time: this.date_list[this.pickerValue[1]],
					value:this.pickerValue
				};
				this.$emit(emitName, pickObj);
			}
		}
	};
</script>

<style>
	.pickerMask {
		position: fixed;
		z-index: 1000;
		top: 0;
		right: 0;
		left: 0;
		bottom: 0;
		background: rgba(0, 0, 0, 0.6);
	}

	.mpvue-picker-content {
		position: fixed;
		bottom: 0;
		left: 0;
		width: 100%;
		transition: all 0.3s ease;
		transform: translateY(100%);
		z-index: 3000;
	}

	.mpvue-picker-view-show {
		transform: translateY(0);
	}

	.mpvue-picker__hd {
		display: flex;
		padding: 9px 15px;
		background-color: #fff;
		position: relative;
		text-align: center;
		font-size: 17px;
	}

	.mpvue-picker__hd:after {
		content: ' ';
		position: absolute;
		left: 0;
		bottom: 0;
		right: 0;
		height: 1px;
		border-bottom: 1px solid #e5e5e5;
		color: #e5e5e5;
		transform-origin: 0 100%;
		transform: scaleY(0.5);
	}

	.mpvue-picker__action {
		display: block;
		flex: 1;
		color: #1aad19;
	}

	.mpvue-picker__action:first-child {
		text-align: left;
		color: #888;
	}

	.mpvue-picker__action:last-child {
		text-align: right;
	}

	.picker-item {
		text-align: center;
		line-height: 40px;
		text-overflow: ellipsis;
		white-space: nowrap;
		font-size: 16px;
	}

	.mpvue-picker-view {
		position: relative;
		bottom: 0;
		left: 0;
		width: 100%;
		height: 238px;
		background-color: rgba(255, 255, 255, 1);
	}
</style>
